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Texas Instruments TL2575-ADJIKV
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- Part No.:
- TL2575-ADJIKV
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
TL2575-ADJIKV.pdf
- Description:
- IC REG BUCK ADJ 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:301
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Product details
Overview
TL2575-ADJIKV from Texas Instruments is a 1-A adjustable-output step-down (buck) switching voltage regulator IC with internal 1-A MOSFET switch, 1.23-V reference, and fixed 52-kHz oscillator. It delivers ±4% output regulation over line, load, and temperature, supports 1.23 V to 37 V output via external resistor divider, and operates from 4.75 V to 40 V input - used in industrial power supplies where compact, efficient DC-DC conversion replaces linear regulators.
For engineers reviewing the TL2575-ADJIKV datasheet, TL2575-ADJIKV pinout, TL2575-ADJIKV application, or TL2575-ADJIKV equivalent, key selection criteria include its adjustable output range, integrated cycle-by-cycle current limiting, thermal shutdown, TTL-compatible ON/OFF control, and compatibility with standard off-the-shelf inductors for minimal BOM count.
Technical Context
The TL2575-ADJIKV implements a fixed-frequency, current-mode buck topology with internal 1-A N-channel power switch, 1.23-V band-gap reference, and error amplifier driving a PWM comparator. Its 52-kHz oscillator sets switching frequency independent of load or input, enabling predictable EMI filtering and stable loop compensation with only four external components.
Feedback is sensed at the FEEDBACK pin using a resistive divider referenced to the 1.23-V internal reference; ON/OFF pin enables TTL-level shutdown with 50-μA standby current. Protection includes cycle-by-cycle current limiting, thermal shutdown, and built-in soft-start behavior during turn-on.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 1 A continuous - supports medium-power loads without external pass devices |
| Input voltage range | 4.75 V to 40 V - compatible with 5 V, 12 V, 24 V, and 36 V industrial rails |
| Adjustable output range | 1.23 V to 37 V - set by external R1/R2 divider; enables single-IC flexibility across multiple system voltages |
| Feedback reference voltage | 1.23 V ±2% - precise internal reference enables tight output tolerance with low-resistor-tolerance dividers |
| Switching frequency | 52 kHz typical - fixed frequency simplifies EMI filter design and avoids audible noise |
| Efficiency | Up to 88% at 12 VIN/12 VOUT, 1 A - reduces thermal load vs. linear regulators and eliminates heatsink in many cases |
| Standby current | 50 μA typical - enables low-power sleep modes in battery-backed or energy-conscious systems |
Pinout & Package
TL2575-ADJIKV is packaged in TO-220 (KV) with 5 staggered leads, 10.16 mm × 8.82 mm body size, and exposed tab for thermal dissipation. Pin 1 = VIN, Pin 2 = OUTPUT, Pin 3 = GND, Pin 4 = FEEDBACK, Pin 5 = ON/OFF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated DC input supply | Accepts 4.75–40 V; requires local 100-μF input capacitor for stability and ripple suppression |
| OUTPUT (Pin 2) | Regulated DC output node | Drives 1-A load through external inductor and catch diode; connects to COUT and feedback divider |
| GND (Pin 3) | Power and signal ground reference | Common return for input/output capacitors, feedback network, and thermal pad; must be low-impedance |
| FEEDBACK (Pin 4) | Resistive divider input to error amplifier | Senses output voltage; connected between R1 (to GND) and R2 (to OUTPUT); sets VOUT = 1.23 × (1 + R2/R1) |
| ON/OFF (Pin 5) | TTL/CMOS shutdown control | Logic-low (<1 V) enables operation; logic-high (>2.2 V) disables switching and reduces quiescent current to 50 μA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A power switch | Eliminates external MOSFET and gate driver, reducing board space and component count |
| Fixed 52-kHz oscillator | Enables consistent loop compensation and predictable EMI signature without external timing components |
| Cycle-by-cycle current limiting | Prevents switch overcurrent during startup, short-circuit, or overload without latch-up or external sensing |
| Thermal shutdown | Automatically disables switching above 150°C junction temperature, protecting IC and PCB during sustained overload |
| TTL-compatible ON/OFF control | Allows microcontroller or logic-level signal to enable/disable regulation with sub-100-μA standby draw |
Applications
| Industrial Motor Drive Power | Factory Automation I/O Module |
|---|---|
Use Scenario: Providing isolated 5 V or 12 V bias supply for gate drivers, sensors, and PLC I/O circuitry in motor control cabinets. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated DC from 24 V or 48 V bus; handles transient surges during contactor switching. Use Value: High efficiency (up to 88%) minimizes heat rise in enclosed enclosures; wide input range accommodates brownouts and bus fluctuations. |
Use Scenario: Generating 3.3 V or 5 V for microcontrollers, ADCs, and communication interfaces (RS-485, CAN) in distributed I/O nodes. IC Role / Device Role / Timing Role: Adjustable-output DC-DC converter configured for precise rail voltages; ON/OFF pin synchronized to system sleep/wake cycles. Use Value: ±4% regulation ensures stable MCU operation across –40°C to +125°C; 50-μA standby current extends battery backup runtime. |
| Grid Infrastructure Metering | Building Management System (BMS) Controller |
Use Scenario: Powering metrology ASICs and isolation amplifiers in smart electricity meters operating from 12–36 V auxiliary supplies. IC Role / Device Role / Timing Role: Primary step-down regulator with high line regulation (±0.2% typical) to maintain accuracy under varying input conditions. Use Value: Internal 1.23-V reference and low feedback bias current (≤100 nA) preserve measurement precision; thermal shutdown prevents field failure during ambient overheating. |
Use Scenario: Supplying 12 V for HVAC actuators and 5 V for controller logic in centralized BMS panels fed from 24 V DC distribution. IC Role / Device Role / Timing Role: Dual-rail generator using two TL2575-ADJIKV units (one for 12 V, one for 5 V), each with independent ON/OFF control. Use Value: Minimal external parts (4 per channel) reduce BOM cost and assembly complexity; TO-220 package allows direct heatsinking to chassis for long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575-ADJ | Same pinout and function but lower max input (40 V vs. TL2575-ADJIKV's 40 V); identical 1-A rating and 52-kHz frequency | No HV variant; not rated for >40 V transients common in industrial 48 V systems | Valid drop-in for non-HV designs; verify input surge margin against TL2575-ADJIKV's tested 42 V abs max rating |
| TPS54202D | 2-A synchronous buck with 4.5–28 V input, 500 kHz switching, and integrated high/low-side FETs - higher efficiency but smaller package | Requires more complex layout and external compensation; lacks ON/OFF pin with μA-level standby | Preferred for space-constrained, high-efficiency designs; TL2575-ADJIKV remains optimal for rugged, low-complexity, high-input-voltage applications |
Compared with LM2575-ADJ, TL2575-ADJIKV offers identical functionality with TI's enhanced process and qualification; compared with TPS54202D, TL2575-ADJIKV trades higher efficiency for simpler design, proven robustness in harsh environments, and superior high-voltage tolerance.
Availability
TL2575-ADJIKV is available at Aetrix Electronics and suitable for industrial motor drives, factory automation I/O modules, grid infrastructure metering, and building management system controllers requiring stable component supply, long-lifecycle support, and automotive-grade reliability screening.
Supply support for TL2575-ADJIKV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability power conversion solutions.
The TL2575 product line was designed specifically for cost-sensitive, rugged industrial and infrastructure applications requiring simple, efficient, and thermally robust non-synchronous buck regulation - replacing linear regulators without complex layout or external switches.
FAQ
What is the maximum input voltage rating for TL2575-ADJIKV?
The absolute maximum input voltage for TL2575-ADJIKV is 42 V, with recommended operating range up to 40 V. This rating applies across the full temperature range and ensures safe operation in industrial 24 V and 36 V systems with transient headroom. Exceeding 42 V risks permanent damage, per TI SLVS638D datasheet Section 6.1.
How do I configure TL2575-ADJIKV for a 12-V output?
To configure TL2575-ADJIKV for 12 V output, connect a resistor divider between OUTPUT and GND, with FEEDBACK tied between them. Use R1 = 1 kΩ to GND and R2 = 8.84 kΩ to OUTPUT - this yields VOUT = 1.23 × (1 + 8.84k/1k) ≈ 12 V. Ensure both resistors are ≤100 kΩ and placed close to the IC to minimize noise coupling, as specified in Section 8.3.1 of the datasheet.
Does TL2575-ADJIKV require an external catch diode?
Yes, TL2575-ADJIKV requires an external Schottky catch diode (e.g., 1N5819 or equivalent) connected from OUTPUT to GND. The diode provides current path during switch-off phase and must handle peak inductor current (≥1.4 A) and reverse voltage ≥40 V. Standard rectifiers like 1N4001 are unsuitable due to slow recovery and high forward drop, per Section 9.1.2.3.
What thermal performance can I expect from TL2575-ADJIKV in TO-220 package?
In TO-220 (KV) package, TL2575-ADJIKV has RθJA = 26.5°C/W and RθJC(bot) = 0.38°C/W. With proper PCB copper pour (≥2 in²) under the tab, it sustains 1 A continuous output at ambient up to 85°C without forced air. Thermal shutdown activates at 150°C junction temperature, providing fail-safe protection during overload or poor heatsinking.
Can TL2575-ADJIKV be used in inverting buck-boost topology?
Yes, TL2575-ADJIKV supports inverting buck-boost configuration per TI application note SLVA017. In this mode, OUTPUT becomes negative output referenced to VIN, enabling generation of negative rails (e.g., –5 V or –12 V) from positive input. Component selection (inductor, diode, capacitor polarity) differs from standard buck, and feedback must be referenced to the negative output node.
TL2575-ADJIKV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
TL2575-ADJIKV FAQ
1.How can I place an order for TL2575-ADJIKV through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-ADJIKV on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL2575-ADJIKV reliable?
The price and inventory of TL2575-ADJIKV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-ADJIKV is usually 5 days.
3.What payment methods are accepted for TL2575-ADJIKV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-ADJIKV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-ADJIKV?
TL2575-ADJIKV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-ADJIKV order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL2575-ADJIKV?
For technical support, including TL2575-ADJIKV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-ADJIKV requirements.
6.How does Aetrix verify that TL2575-ADJIKV is sourced from the original manufacturer or authorized distributors?
All TL2575-ADJIKV products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL2575-ADJIKV meets industry standards.
7.What is the process for return or replacement of TL2575-ADJIKV?
All TL2575-ADJIKV units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-ADJIKV, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL2575-ADJIKV part is unused and in its original packaging.
Return procedure for TL2575-ADJIKV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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